This is Fwd:-LSC-problem in view mode; [Up]
Date: Sun 15-Nov-1988 01:46:11 From: Unknown Subject: Fwd: LSC problem Forwarded by b.bum because the computers at Harvard are being mean to David. Forwarded mail follows: ---- >From: fry%zariski@harvard.harvard.edu (David Fry) I was wondering if anyone has thought of using the NeXT computer for an anti-noise demonstration. I think it would be a nice little trick. For those who don't know, systems are being developed that can do a Fourier analysis of repeated sounds to find their component sound waves, and then emit a sound composed of the the mirror image of these waves, resulting in destructive interference. Your ear then hears nothing. This could be used in an airplane, for instance, so the passengers would hear no engine noise. With its built-in digitizer, its sound generation capabilities, and its powerful DSP chip for Fourier analysis, it seems that it would be pretty simple for the NeXT to do this in real time. Maybe the people at NeXT have already done this? David Fry fry@huma1.harvard.EDU Department of Mathematics fry@huma1.bitnet Harvard University ...!harvard!huma1!fry Cambridge, MA 02138 >From: rwn@utacfd.UUCP (Ralph Noack)
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